The Alexandria library, a quantum-chemical database of molecular properties for force field development.

The Alexandria library, a quantum-chemical database of molecular properties for force field development.
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DOI:
10.1038/sdata.2018.62
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发表时间:
2018-04-10
期刊:
影响因子:
9.8
通讯作者:
van der Spoel D
van der Spoel D
中科院分区:
综合性期刊2区
文献类型:
--
作者:
Ghahremanpour MM;van Maaren PJ;van der Spoel D

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数据质量以及库大小是力场开发的关键问题。为了预测大化学空间中的分子性质,建立力场的基础需要包含各种各样的化合物。列表中的分子物理化学性质也需要准确。由于用于开发现有力场的数据透明度有限,很难确定数据质量,可重复使用性很低。本文介绍了亚历山大图书馆作为一个开放的和免费访问的数据库优化分子的几何形状,频率,静电矩高达hexadecupole,静电势,极化率和热化学,从量子化学计算获得的2704化合物。将数值制成表格,并与实验数据进行比较。该库可以帮助系统地开发和训练各种分子的经验力场。
Data quality as well as library size are crucial issues for force field development. In order to predict molecular properties in a large chemical space, the foundation to build force fields on needs to encompass a large variety of chemical compounds. The tabulated molecular physicochemical properties also need to be accurate. Due to the limited transparency in data used for development of existing force fields it is hard to establish data quality and reusability is low. This paper presents the Alexandria library as an open and freely accessible database of optimized molecular geometries, frequencies, electrostatic moments up to the hexadecupole, electrostatic potential, polarizabilities, and thermochemistry, obtained from quantum chemistry calculations for 2704 compounds. Values are tabulated and where available compared to experimental data. This library can assist systematic development and training of empirical force fields for a broad range of molecules.
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